Waterproofing composition



ance; gloss; and-zh i n f" his mventron :rela ,ematter sxiitableiorcoating fibers 25: and other --t surfaces: :rwhere= waterproof are desired. riParaffin-candwoth re axe, v7 1, 10, nly ed iOlathiSt-EUIPQS h atheyeheve d sadva tages which it is the purpose of this inverrtlon to'overcome. I1

111-",have rioundeth tv it 1 gum made from polymerized rosin and g y rlne 19 tosrparafiinrwa i part ;-:8 .l-, 8 b18c-P '9PI i to the wax. ,rrhe. wat r-resistan e; re se-resi th wart are, im-

i v dthetenden y f. he w 'QQ lQQ Z-fi F L is u e nthewax asw lesser as f e v a v sme 21 55. and there is. e A-tendencyito blo pnatr In. order i to -;acc mpl h these r su sr-the W 1 V and 1 the; esterified polymerized. rosin =-are melted to r n tated; unt l arh m e eous-mixr- =1::ture-:is.;obtain dr 'Ihe.combinat n: eni p V -p ed;--whi e -st 1 int emQ te r-S et tw he 1 V face which it is desired to waterprooi I am aware of theractrthat esber ums 31:1; --Resins thatare usedirl to- ,from-;-commereial wood-wand; ume r insh be 11 ;;t 5 w a: ""been ;,used with par ffin-;w .x. d fi l l is v food groii ilc s rr i 8 3202 o r ri fi experienced with these, products ;in pr son; toxicity-tests weresmade on the ester gum usa du t s pa a on it resm upon 9 made'frombolyrnerized rosin and gl'ycerine. A binned eat T1 appe sw c {W X group of eightirats were' selected for the experitron'ofthe'res n an 5 the OXId V D t mentfto' determine any chronic effects of the is o n r soluble in the wa it, ep r s resin when supplied-daily'over a thirty daype- Theflmore theester gum is diluted with wax,:the g n v the d f thirty w i Qug 1 mor fi ly does th s 8D t 3 3 Fplace- "were sac'ri-fiedand autopsies performedflto' de- When mlxtures of ordin y ester and termine any effects that might be attributable P Wax are cooled thenfemelteds t to thetest material. From thegross appearance aration also takes place whereas esterifiedpoly and-examination f or V r gans, aswell as 'Wel ht 1305111661095 o e underithesfi i gain .11; was definite' 'that the anlmals were lr 8. 2223 33821 and a fl homogeneous? t 15 normal, healthy state and the resin had no'toxic -e V efieets g V Ester gum made-frompolyme t' n'i d An ester gum made from hydrogenated rosin glycerrnetis notonly compatiblewithp Wax 5953116 glycerine was also found to have excellent but a: number- ;nat1ra1"flnd/Smthet1 sta ility with. teen-m we; sub ect d to tinuousuheating oyer along period of time montan, 'ozoker1te,:-as ,well ,asuwaxy substances con such as stearic'acid'andjcetyl alcoholz; Ivprefer, 1 Wag-FP t fzonowmg; formula" howeverrtouse parafiinawa'x onaccount' of it's z w low cost, light color? andayailability.-= i cent Ester gums can be made from polymerized Hydlj-ogenatgd rosin using other polyhy'dric such as ethylene 98% glycerme glycol, di ethylene glycol, tri ethylene glycol, The hydrogenated rosin was melted and heated diglycol, sorbitol, mannitol, erythritol, and to 210 C. and the glycerine was then added.

270 C. and the temperature held at this point until an acid number of 12 was reached. A vacuum of 20 to 21' inches was then applied and maintained until the acid number dropped to 6 to 8. The finished resin had the following specifications:

Melting point (capillary tube) C.. 54-56 Color (U. S. rosin standards) WW-WG Acid number 6-8 It will be observed that the ester of the polymerized rosin has a considerably'higher melting point than the ester of hydrogenated rosin. It is, therefore, preferred for use with paraflin wax as films containing the hydrogenated rosin are more tacky and have a greater tendency to block or stick, and collect dirt. Under certain conditions. however, it may be desirable to make a blend of the esters of the two rosins or to make a mixed ester by esterifying a mixture of polymerized rosin and hydrogenated rosin.

Polymerized rosin and hydrogenated rosin were each blended with parafiin wax but found not to be as satisfactory as the esterifled products. Esterification increases the melting point and improves the odor of the resin. This latter is of considerable importance when resins are used in coatings that come in contact with food prod? ucts. In addition, the polymerized rosin was found to have its heat stability increased when esterified.

As the resin content of a wax coating is increased, it becomes desirable to add a plasticizer to obtain proper flexibility. I have found that a plasticizer containing branched chain olefinic hydrocarbons of relatively high molecular weight is particularly satisfactory as it is compatible with both the resin and the wax. One group of viscous polymers that may be used are those produced by the polymerization of normally gaseous mono-olefins, such as the butenes, by catalytic contact with aluminum chloride and which have a viscosity in the neighborhood of 3000 Saybolt seconds Universal at 210 F. Such a constituent is substantiallyinert, light in color, and maintains the composition in a plastic condition for a long period of time.

By polymerized rosin I mean a commercial grade of rosin that has been treated to increase the molecular weight and melting point and to reduce the unsaturated characteristics of the rosin. This polymerization can be carried out in solution using reagents capable of causing polymerization such as sulphuric acid, boran tri fluoride, an anhydrous metallic chloride such as an anhydrous chloride of aluminum, tin, zinc, titanium or the like, ultra violet light or other polymerizing agents.

By hydrogenated rosin I mean an acid resin which consists of partially and completely hydrogenated acid and non-acid constituents of lOSln.

" In general, the formula preferred is as follows:

Per cent Resin -80 W x -90 Plasticlzer 0-20 The temperature was gradually increased .to'

By plasticizer I mean an agent used to increase flexibility.

More specific formulas which have been found to give satisfactory results are:

Plasticizer-branched chain olefinic hydrocarb nn I claim:

l. A waterproofing composition comprising a mixture of a waxy substance and an ester gum of a polyhydric alcohol and polymerized rosin; the waxy substance being selected from a group consisting of paraffin wax, carnauba wax, candellila wax, beeswax, montan wax, ozokerite, stearic acid and cetyl alcohol; and the polyhydric alcohol being selected from a group consisting of glycerine, ethylene glycol, di-ethylene glycol, triethylene glycol, diglycol, sorbitol, mannitol, erythritol, and pentaerythritol; the ester gum being used in proportion of 10 to 80% of the composition and the waxy substance being'used in the proportion of 20 to 90%.

2. A waterproofing composition as set forth in claim 1, wherein the polyhydric alcohol is glycerme.

3. A waterproofing composition as set forth in claim 1, wherein thewaxy substance is parafiin wax.

4. A waterproofing composition as set forth in claim 1, which includes a plasticizer.

5. A waterproofing composition as set forth in claim 1, which includes a plasticizer comprising a branched chain olefinic hydrocarbon.

6. A fibrous foundation coated with the waterproofing composition set forth in claim 1.

7. A waterproofing composition comprising a mixture of a waxy substance, an ester gum made from a polyhydric alcohol and a polymerized rosin, and an ester gum made from a polyhydric alcohol and hydrogenated rosin; the waxy substance being selected from a group consisting of paraffin wax, carnauba wax, candellila wax, beeswax, montan wax, ozokerite, stearic acid and cetyl alcohol; and the polyhydric alcohol being selected from a group consisting of glycerine, ethylene glycol, di-ethylene glycol, tri-ethylene glycol, di-

glycol, sorbitol, mannitol, erythritol, and pentaerythritol; the ester gum being used in proportion of 10 to of the composition and the waxy substance being used in the proportion of 20 to 8. A waterproofing composition comprising a mixture of paraffin wax and an ester gum made from glycerine and polymerized rosin; the ester gum being used in the proportion of 10 to 80% of the composition and the wax being used in the proportion of 20 to 90%.

9. A waterproofing composition comprising a mixture of paraffin wax, an ester gum made from glycerine and polymerized rosin and an ester gum made from glycerine and hydrogenated rosin; the ester gum being used in the proportion of 10 to 80% of the composition and the wax being used in the proportion of 20 to 90%.

JAMES FRANCIS MAGUIRE. 

